Healthy, Not Trans
Lard, stored animal fat, no trans bonds.
Ancel keys: fraudulent. The vast majority of c-c bonds in all fats, plant & animal, are single, aka saturated (no room for more hydrogen side atoms). If double bonds (unsaturated) present & converted to single bonds by industrial hydrogenation lacking control: ½ cis, ½ trans. All living cells do cis-. See google images. No evidence nat. Sat. Fat unhealthy.